Question
Define chemical symbol and what is the significance of a chemical symbol. who first invented a chemical symbol.
Answer:
Chemical symbol - notation of one or two letters representing a chemical element.
J.J Berzelius - Swedish Scientist introduced chemical symbol in 1813.
The significant of chemical symbol is to have shorthand way to represent an element on the periodic table. it also used to standardized the language of chemistry and to identify elements and atoms in a chemical formula.
Explanation:
You have to convert the mass from g to kg since the unites for a joule is kgm²/s². When you do this you should have E=(1.0×10⁻⁷ kg)×(3.00×10⁸ m/s)². With that E=9.00×10⁹J which equals 9.00×10⁶kJ.
I hope this helps. Let me know if anything is unclear.
It will have 12 neutrons.